What's the longest thumb driven syringe pole you can get and where can you get one

The ones that I make are 4 foot. Plenty long, make them too long it is more difficult to make an accurate delivery. I make a 2 foot break down model one also that I carry on my ATV. I put it a pvc tube to carry it and components.

I built mine out of one of those expandable paint poles.

Tomahawk traps sells one that is 72" for $100.00.

Im a journey man toolmaker. I couldnt find exactly what I was looking for so, I ordered material to make my own take down model. May make a few to sell.
3,6,9' model or a 4,8 ' . Not sure which yet. But thanks guys for the suggestions.